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Ryerson Library LED Retrofit
They're in the process of retrofitting the existing 30x30 2x F17T8/741 troffers at the Ryerson library to LED. AS part of the retrofit they're keeping the existing fixtures and replacing the lamps with 4000K LED tubes and replacing the prismatic 12 diffusers with a custom 16 cell parabolic louver assembly. Seems to work ok because of the low ceilings and closely spaced troffers. 

I guess the odd size of the troffers meant they can't readily find replacements for them. The T8s that are getting replaced were installed in the mid 90s along with the specular reflector that's being reused. The fixtures originally used 2x FB40T12s and are from 1974. 
Keywords: Indoor_Fixtures

Ryerson Library LED Retrofit

They're in the process of retrofitting the existing 30x30 2x F17T8/741 troffers at the Ryerson library to LED. AS part of the retrofit they're keeping the existing fixtures and replacing the lamps with 4000K LED tubes and replacing the prismatic 12 diffusers with a custom 16 cell parabolic louver assembly. Seems to work ok because of the low ceilings and closely spaced troffers.

I guess the odd size of the troffers meant they can't readily find replacements for them. The T8s that are getting replaced were installed in the mid 90s along with the specular reflector that's being reused. The fixtures originally used 2x FB40T12s and are from 1974.

20171113_210632.jpg 20171013_195331_M.jpg 20171020_211440.jpg IMG_20160312_143117.jpg IMG_20160312_142129.jpg
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Filename:20171020_211440.jpg
Album name:joe_347V / Commerical Lighting
Keywords:Indoor_Fixtures
Filesize:529 KiB
Date added:Oct 24, 2017
Dimensions:3000 x 1687 pixels
Displayed:329 times
URL:http://www.galleryoflights.org/mb/gallery/displayimage.php?pid=22261
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streetlight98   [Oct 25, 2017 at 09:30 PM]
Hmm yeah the parabolics are a bit glary. I guess they used mirrored parabolics? I like the "brushed aluminum" parabolic louvers since they don't reflect the light as harshly. I still think these parabolics look nicer than the plain jane diffusers though.
joe_347V   [Oct 27, 2017 at 06:28 PM]
I think they're brush but have a slight gloss to them so they sorta look like mirrored parabolics in the picture. Yeah these look a lot less plain compared to the diffusers lol.

You can barely make them out but there's a bunch of disconnected 100w MV cans along the concrete wall on the right. This place must have been bright with the FB40s and 100w MVs.

Comment 1 to 2 of 2
Page: 1